text: When , the linear term eventually dominates and the system is able to reach a steady state as . At steady state (), the balance is given by the equation
  where  represents the Lambert W function. From the properties of Lambert W function, it is easy to see that the steady state temperature provided by the above equation exists only when , where  is called as Frank-Kamenetskii parameter as a critical point where the system bifurcates from the existence of steady state to explosive state at large times.